Spray nozzle



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Des. l, i931. L, miam ai? SPRAY NOZZLE l Filed March 23, 1929 fs a 7 2 Ving taken on line TVT-IV.

Patented Dec. 1, 1931 UNTEDf-STATKES PATENT OFFICEl i FRANK L. NASH AND .Tosnrrr E. cox, 'oFnosEMARx NORTH omonima SPRAY NozzLn Applicationiea Marchas, 1929. serai No. 1349.431.

Our invention relates to spray nozzles for mixing uids and particularlyJ to nozzles adapted for atomizing or spraying a fluid in a finely divided state. I

One object oftheinvention is toA provide la simple and eiiicient :nozzle which is cafpable of close adjustment and' exact regulation. Y. f 1

Another object is the provision of a nozzle adapted to atomize one fluid under theaction of a second fluid under pressure.

A further obj ectis the provision of a nozzle in which all parts are easily accessible and in which the valve seat is renewable.l

Other objects ofthe invention. will appear from the following specicationwhen read in conjunction with the accompanying drawings in which, t w H Figure 1 is a sectional viewthroughone form of spray nozzle embodying' our invention; f

Figure 2 is a perspective View in detail of lthe v regulating Vmechanism vshown in Figure 1; A

.Figure 3 is-a sectionalview of a modified form of spray nozzle; and j Figure 4 is a detailed sectional view.of the regulating mechanism* employed with the nozzle shown in Figure3, the section be- Referring to Figure 1 the reference vcharf `acter 5 designates Athe body of the spraynozzle, this body havingaalongitudinal passageway therethroughand containing a vchamber 6. Associatediwith the passageway in body 5 and movable back and forthin the chamber 6 is a regulating needle 8. As shown, this needle is substantially cylindrical in cross-section and has near its forward end an annular groove 9. In front `of the groove 9 the needle is reduced in cross-section to form a conical portion-10,` a reduced portion 11 .and a pointed end 12. l

Threaded into the forward endiof body 5 is a nipple 13, thisnipple having a conical seat 14 on its inner end adapted for cooper- .ation'with the conical portion ,10, of .needle .8. When the needle 8 occupies its extreme right-hand position as shown in.y Figure 1,

4*the conical portion `10 of needle ,'Sengages tothe rodjbyset screwl 24. The other end the seat 14 and seals the connection between chamber 6 andthe interiorof nipple 13. The left-hand end kof chamber 6 vis rendered fluid tight by means Vof a packing 15 which closely surrounds the stem of needle 8 and is held in intimate relation therewith by means of an apertured threadedplug 16. Y i

Fluid may besupplied to the chamber 6 through a pipe 17a and the liow `of this fluid .through the nipple 13 may be varied by regulating the position of needle 8. For vthe purpose oflaccromplishing this regulation .there'is associatedwith the tbody 5 a rotatable rod. 17 Ycarrying at its inner end a Acam A18 (see F ig. 2) This cam is eccentrically mountedjwith respect to rod- 17 andwhen this rod is rotated it will be;seen that the needle 8 is moved back and forth in ,accordance withV `the amount of such rrotation. Threaded linto the body 5, and acting as `Aa `bearing for the rod 17 is a tubular member ,rod 17 and prevents the escape-of liuid, from chamberG. Any suitable means may be provided for rotating the rod 17 but asvhere shown a lever-22 havingan. eye 23 is secured of lever 22 contains an eye to receive a member 25 'whichY is connected to an actuating .rated at to receive a iiuidsupply pipe 3 1.

i vThe body 5r has a reducedthreadedportion :32 for the reception'of a tubularcap33;v This i' `cap is p erforated'at 34`toreceive an adjust' .ing screw 35 which coacts with a locknut 36.

Adjustment of the screw 35 back and` forth varies the distancethrough which the needle "8 can travelA so that the extent to which the 1 needle valve opens may be exactly controlled.

Afterlong continued Ause the cooperating vsurfaces of nipple 13 and conical portion 10 of 'needle 8 may be fouled by the accumulation of dirt'or these surface may become :100

worn to an uneven contour. In order to make it possible to remove this dirt without dismantling the parts of the nozzle, and to vary the angular relation of these cooperating surfaces for distributing the wear, the left-hand end of needle 8 is slotted at 37 so that by removal of the cap 33 a screw driver may be inserted to rotate the needle 8.v y Y One application for which this spray nozzle is particularly adapted is in the atomizing of water by means of air under pressure.l lNhen used in this connection water is sup-Y plied to the chamber 6 of the nozzle through' the pipe 17a, while air under-pressure is supplied to the interior of cap 28 through pipe 31. kUnder suchconditions the waterenters chamber 6 and upon opening of the needle valve by actuation vof lever 22 some of the liquidescapes through the nipple 13. At the same time air entering theV interior of cap 28 from pipe 31 isgiven a swirling motion and in escaping through the orifice 29 encounters the-*line stream of liquid'coming out of nipple 13. Through the interaction of these two fluids the water is broken up into a line spray. The amount of water V`escaping through nipple V13 may be controlled by adjustment of the throw of needle8 or by. the regulation of theposition of the-'needle through the actua.-

tion of lever 22. .The condition of the spray may further be varied by changing the pressure-by'which air is 4supplied to the interior ct-capw28. A l vl' This for-mici device-.is particularly practical -and eliicient in that the arrangement of cam181for cooperation with groove-9 is such that the position of needle 8` may be lregulated-very closely-'and exactly by manipulati'on-o-lelver'- 22. Y 'lt vwill also be mainfest-that vallfp'artsoi the-nozzle are 'accessible'for repairor adjustment `and that-in easel the needle valvefbecomes worn, the nipple 13anay be replaced by removing cap' 28.

InF-igures 3 and 4 wehavelshown fa slightlyvmod-ied form oicnozzlel such as that -disclosed in our copendi-ng application Serial No. 271,329,1iiled April 19, 1928, Patent No.Y

1,734,872-, granted November V5,- 1929, of which the present case is a'continuationinpart The'nozzle shown in Figurel 3 comprises a hollow body 38-containing a chamber 39. `This Vbody contains a longitudinal passagelway the vforward portion ofwhich'is threaded to receive ahollow nipple I4() having are- Vduced rforward end 41 'and containing -a conical valve-'seat 42 at -its rearward end. Longitudinally movable through the openling in body 38 is a needle 43. This needle is reduced vin 'cross-section at i-tsforward end to-orm a conical valve seat 44 Vadapted to cooperate with theseat 42 on nipple 40 yand is further reducedv to a sharp point 45 'fwhich in one position extends throughthe restricted opening in thefright-harid end of "nipple 40. The rear end of body 38 is of containsa threaded opening vtoreceive a hollow screw cap 52 which is knurled and is adapted to cooperate with a locking nut 53.

Ylt will be seen that the cap 52 may be screwed in and out and may be locked in any desired positionby'meansof the nut 53. The cap 5() also conta-ins a lateral'opening 54 for the reception of a needle operating arm 55, this arm being pivotally secured to the cap by a pin 56. The end of yarm 55 extending within the capy 50 is'bifurcated, as shown in Figure-4, each fork of the Vbifurcation being rounded to cooperate with two spaced collars lsecured to the needle 43. 1rWhen the arm 55 isxswung from side to side the needle'43 is moved back and forth through the body l38 so as to varythe opening between the' conical seat 44011 the needle and the valve seat 42 on nipple 40. The vextent of this longitudinal movementgcan be varied by adjustment. ot the hollow plug l52'relierred to above.

-A portion of' the body 38 is cut awayat the forward end and is threaded at 59 to receive fauhollow rounded cap 60 having `a lateral opening 61 t'herein. The opening 61 is in substantial alinement with the passage vthrough body 38, and when the parts vare in position this opening registers with the reduced end of nipple 40. The cap 60 contains -a lateralopening 62 communicating with a fluid supply pipe 63 secured thereto by 'a thr'eadedconnection 64. A tube 65 threaded into'thebody l38 alords 'communication pipe 63. For Vthe sake of this-description we shall assume that wateris vsupplied tothe chamber 39 throughpipe 66, and air under pressure is supplied to capV 60 through pipe 63. Solong as the needle 43 occupies-itsextremeright-hand'position no water can escape from the chamber 39, because the out- Aletfromthis chamber is effectively sealed by thev engagei'nent` oit conical portion 44 of the "1' needle 'with valve seat '42 of nipple 40. When, however,`fthe lever 55 is moved so as to shde the needle 43 to the left, water can escape fromthe chamber 39 and will-pass out through the reduced end of nipple y41. If

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at this time air is being supplied to the hollow cap 60 this air will be given a swirling motion by the interior rounded surface of cap 60 and will then escape laterally through the opening 61 where it will encounter the water which is escaping from the nipple 40. The interaction of this air under pressure and the water will cause the water to be broken up into a finely atomized spray which will be thrown out away from the nozzle in a highly diffused form. The extent of this interaction may be readily controlled by regulating the position of needle 43 through lever 55, and also by varying the pressure under which the air is supplied through pipe 63. The degree o f atomization can also be controlled by adjustment of the hollow plug 52 which can be made to limit the amount by which the needle valve is opened.

lt will be apparentthat the spray nozzle structure which we have just described is not only very simple in construction, but is highly efficient in operation. This is particularly true because all parts of the nozzle can be reached for repair or replacement particularly the valve seat contained in the removable nipple. Another particular advantage of this construction is the means for adjusting the throw ofthe regulating needle without necessitating dismantling of the partsor the use of special tools.

Although we have herein shown and described only two forms of spray nozzle embodying our invention, it will be obvious that various changes and modifications may be made in the details thereof, within the scope of the appended claims, without departing from the spirit and scope of our invention.

That is claimed is:

l. A spray nozzle comprising a hollow body having a fluid inlet and a fluid outlet; a removable tubular nipple secured in said body in alinement with said outlet and having an inner tapered valve seat; a needle movable in said body, said needle containing an annular groove in its outer surface, and having a portion adapted to cooperate with said tapered valve seat; eccentric means for moving said needle to regulate the size of said outlet, said means extending into said groove means for adj Listing the throw of said needle, and means whereby said needle may be rotated.

2. A spray nozzle comprising a hollow valve body; a removable valve seat threaded into said body; a needle movable longitudinally of said body and rotatable therein, and having a tapered portion 'on one end cooperating with said valve seat, and a slot in the other end; a cap secured to said body and enclosing the slotted end of said needle; a cam groove extending entirely around needle; and needle operating means including an eccentric member operatively associated with said groove, whereby said needle said can be moved irrespective of the angular position of said needle.

3. A vspray nozzle comprising a hollow valve body; a movable control needle in said body, said needle having a slotted-end, and a cam groove extending entirely around it; a cap enclosing said slotted end; and eccentric means engaging said groove to move said needle, irrespective of the angular position occupied by said needle.

In testimony whereof We have signed our names to this specification.

FRANK L. NASH. JOSEPH E. COX. 

